JPH02290609A - Chockless roll bending device of rolling mill - Google Patents

Abstract

PURPOSE:To execute a fine adjustment of a crown by sliding tapered parts of a upper and the lower work rolls, and allowing the upper and the lower work rolls to ascend and descend, respectively so as to directly bend. CONSTITUTION:At the time of rolling, thrust force generated in the upper and the lower work rolls 1, 11, respectively is supported by the upper and the lower thrust receiving rolls 2, 12. In this state, one thrust receiving roll of the upper and the lowerthrust receiving rolls is moved in the roll axis center direction by a roll moving means, only one work roll is shifted, or by moving the upper thrust receiving roller 2 and the lower thrust receiving roller 12 in the direction opposite to the roll axis center direction, respectively, the upper and the lower work rolls 1, 11 are shifted in the directions opposite to each other, and tapered parts 11a, 11b of the upper and the lower work rolls are allowed to slide mutually in the axial direction. The rolls are allowed to ascend and descend thereby, respectively, and by utilizing the force of a crown from a reinforcing roll supported so as to be pressable by each roll surface, and an intermediate roll, and bringing the upper and the lower work rolls 1, 11 to direct bending, its crown is brought to fine adjustment, and a plate shape of a rolled stock W is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a roll pending device for chockless small diameter work rolls in a cold rolling mill. [Prior art] In a cold rolling mill, in order to roll a rolled material with a thickness of 0.1 to 2 mm under high pressure, for example, a roll diameter of 40 to 8 mm is used.
Small diameter work rolls such as 0III1 are used. However, for such small-diameter work rolls, if chocks are installed at both ends to perform roll pending, the chocks will inevitably become smaller, and the bearing capacity will also become very small. When rolling at high speeds, problems such as seizure of bearings occur.

Therefore, conventionally, as an example of a rolling mill that uses a chockless work roll and performs high-speed rolling without directly performing roll pending, a rolling mill as shown in FIGS. 3 and 4 is used.
A Sendzimir rolling mill is used. In Figures 3 and 4, (51) and (61) are upper and lower work rolls, and both end surfaces thereof are housings (50
) is supported by a bearing block (80) installed in the roller exchange lid (82), and a thrust receiving roller (83) is supported by a bearing block (80) installed in the roller exchange lid (82).
2) is the lower first intermediate roll, and the opposing roll ends are tapered and each has a chock (77).
．． (87), and the two are relatively shifted in the roll axis direction to prevent edge drop of the rolled material. (53) and (63) are upper and lower side second intermediate rolls, (54) and (64) are upper and lower center second intermediate rolls, which are supported by chocks (75) and (not shown), respectively. 2 intermediate rolls (53), (63
) is rotated by a drive device (not shown). (
56) is an upper split reinforcing roll, and the roll support shaft (55
) is rotatably attached to the shaft. This roll support shaft (5
5) has a pinion (71) and a rack (7) at both ends thereof.
4), the fixed main eccentric pusher (72) rotates and each saddle (57a), (57
Move up and down from b). In addition, the roll support shaft (55) is fixed and the crown adjustment push (73) is rotated by a drive device (not shown).
) is pending in a U-shape, and the upper split reinforcing roll (56
), the upper work roll (51) is indirectly suspended via the upper second intermediate rolls (53), (54), and the upper first intermediate roll (52), and the upper first intermediate roll (52) is indirectly suspended.
In conjunction with the shift in 2), the plate shape of the rolled material 4) is controlled.
(58) is an upper side split reinforcing roll, which is rotatably attached to the roll support shaft (57) and has almost the same structure as the upper split reinforcing roll (56), but does not have a pending function. Each saddle (57a) (57b) is respectively latched to the housing (50), and each of the chocks (75) (77) is suspended from the housing (50) by a spring (76) (78), respectively. There is. Note that the lower divided reinforcing rolls (66) (6B) are also constructed in substantially the same manner as described above, and operate in the same manner. (
81) is a maintenance lid, and a roll exchange lid (82) is attached to this maintenance lid (81) so as to open laterally. When exchanging the upper and lower work rolls (51) and (52), move the upper split reinforcing roll (56) upward and replace the upper second intermediate rolls (53) (54) and the upper first intermediate roll (52). is raised by springs (76) and (78). Then, open the roll exchanger M (82) and extract the upper and lower work rolls (51) (61).

[Problem to be solved by the invention]

The conventional chockless rolling mill mentioned above had the following problems to be solved. That is, in conventional rolling mills using chonless work rolls, such as the Sendzimir type rolling mill mentioned above, the work rolls cannot be directly suspended, so it is difficult to precisely control the plate shape of the rolled material. Edge drop control was also not perfect. In addition, in the case of relatively low-speed rolling, even if a chock is provided on the work roll and the work roll is pending, if the work roll is frequently replaced, such as in the case of stainless steel rolling, a chock and its hending device are required. Therefore, there were problems such as the replacement work being complicated.

The present invention was proposed to solve the above problems, and an object of the present invention is to provide an apparatus for directly bending a chonless work roll.

[Means to solve the problem]

The present invention provides a means for solving the above-mentioned problems, including: chockless work rolls disposed above and below a rolling material passing mask; a plurality of intermediate rolls supporting the upper and lower work rolls so as to be able to press them against each other; In a rolling mill equipped with a reinforcing roll that supports an intermediate roll so that the roll surfaces can be pressed together, and a thrust receiving roller that supports both ends of the upper and lower work rolls in the roll axis direction, the rolling mill has an asymmetric taper angle at both ends. The upper work roll is provided with a taper portion of the upper work roll, the lower work roll is provided with a taper portion with a taper angle that abuts each of the taper portions of the upper work roll, and the upper and lower work rolls are moved in the roll axis direction, respectively. An object of the present invention is to provide a chockless roll pending device for a rolling mill, which is equipped with supporting upper and lower thrust receiving rollers and roller moving means for moving at least one of the upper and lower thrust receiving rollers in the direction of the roll axis. It is something to do.

[Function] Since the present invention is configured as described above, it has the following function.

That is, during rolling, the upper and lower thrust receiving rollers support the thrust forces generated on the upper and lower work rolls, respectively. Then, either the upper or lower thrust receiving roller is moved in the roll axis direction by the roller moving means to shift only one work roll, or
Moving the upper thrust receiving roller and the lower thrust receiving roller in opposite directions of the roll axis direction to shift the upper and lower work rolls in mutually opposite directions, and causing the tapered portions of the upper and lower work rolls to slide against each other in the axial direction. Using the crown force from the reinforcing rolls and intermediate rolls, which are supported by the roll surfaces so that they can be pressed together,
The upper and lower work rolls are directly suspended to finely adjust their crowns and control the plate shape, especially edge drop, of the rolled material. [Example] An example of the present invention will be explained with reference to FIGS. 1 and 2. Note that the same members as in the conventional apparatus shown in FIGS. 3 and 4 are designated by the same reference numerals, and redundant explanation will be omitted.

In Figures 1 and 2, (]) indicates the upper work roll,
(II) is the lower work roll, and the upper first intermediate roll (
52) and the lower first intermediate roll (62), respectively. And, at both ends thereof, there are non-paired taper parts (la), (lb) (with the same taper angle).
lla), (llb) of the upper work roll (1) and the tapered part (lla) of the lower work roll (11). (llb
) and are designed to slide against each other.

(2) is an upper thrust receiving roller, which is rotatably attached to the inner surface of the adjustment lid (3) on the driving side and the upper roll exchange lid (4) on the working side, and supports the upper work roll (1) on the roll axis. Supports the heart.

The adjustment lid (3) is placed in the recess of the bearing prong (lot), and
The upper roll replacement lid (4) is attached to the maintenance lid (8l),
Each is connected by a hinge (5). Both adjustment M (3) and the outer surface of the upper roll exchange lid (4) are the bearing block 00) and maintenance m! (81) and
They are each connected by a hydraulic cylinder (6), and during rolling, the hydraulic cylinders (6) are used to control both platelets (3).
And upper roll replacement lid (4) bearing bronc 00 and maintenance I! (81) are each pressed with a predetermined pressure. (7a) (7b) are the drive side and work side wedges, and the drive side wedge (7a) is the adjustment lid (3).
) and the bearing block 00), there is a wedge on the working side (
7b) is the upper roll exchanger [H4] and the maintenance lid (81
) and each hydraulic cylinder (8
a) It is mounted for horizontal movement by (8b). Both hydraulic cylinders (8a) (8b) are controlled by servo valves (not shown) so that they operate in opposite directions and with the same dimensions. θ′! J is a lower thrust receiving roller, which is rotatably attached to the inner surfaces of the bearing block 00 and the lower roll replacement II04), and supports the lower work roll θ1) in the roll axis direction.

The lower roll replacement H4) is connected to the maintenance M (81) by a hinge 0ω, and during rolling, it is locked to the maintenance i (81) by a locking member (not shown), and the upper work roll (1) and the lower work roll 01) It opens and closes together with the upper roll replacement lid (4) only when replacing the roll.

During rolling, the upper work roll (1) and the lower work roll ( A crown is formed on I1) to control the plate shape of the rolled material (A).

Furthermore, in addition to these operations, for example, when enlarging the crowns of the upper work roll (1) and lower work roll (!1), the wedge (7a) is pushed out by the hydraulic cylinder (8a) on the driving side and at the same time , when the wedge (7b) is pulled in by the hydraulic cylinder (8b) on the work side, the adjustment lid (3) and the upper roll exchange lid (4) rotate slightly around their respective hinges (5), and the adjustment M (3) and the bearing block 00 expands, and the upper roll replacement cover (4) and the maintenance I! (81) is reduced, both upper thrust receiving rollers (2) move toward the drive side, and the upper work roll (1) is shifted in the direction of the roll axis as shown by the arrow. This shift of the upper work roll (1) causes its tapered part (1aL (lb)
- Taper part (lla) of Jl/ (II). (l
lb) and move up and down respectively,
Upper work roll (1) and lower work roll θI) are directly pending. In this way, while monitoring the plate shape during rolling, the pending amount of the upper work roll (1) and lower work roll 00 is finely adjusted to form the optimum roll crown, and the plate shape of the rolled material (匈) is adjusted. Control.

As another embodiment, the lower thrust receiving roller cm can also be made movable in the direction of the roll axis, and the upper work roll (l) and the lower work roll (11) can be shifted in opposite directions to perform the pending operation.

In this embodiment, the rolled material can be directly suspended by directly suspending the upper work roll (1) and the lower work roll (ll1) without shifting the upper first intermediate roll (52) and the lower first intermediate roll (62). (enemy) edge drop can be improved. The chockless roll pending device of the present invention is not only applicable to the Sendzimir type rolling mill of this embodiment, but also to a multi-stage cluster rolling mill, for example. This method can be applied to all rolling mills that perform high-speed rolling under high pressure using small-diameter work rolls.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects. The roller moving means moves the thrust receiving roller in the roll axis direction to shift the upper and lower work rolls or either one of them, and the upper and lower work rolls are moved up and down by sliding, respectively, thereby directly moving the upper and lower work rolls. Since it can be pending, it is possible to make fine adjustments to the crown. Therefore, since the crown of the work roll can be finely adjusted while monitoring the plate shape of the rolled material during rolling, the accuracy of the plate shape can be improved. In particular, the edge drop of rolled materials can be adjusted precisely.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view of essential parts of a rolling mill using a chockless work roll and its pending device as an embodiment of the present invention, and FIG. 2 is a plane showing a cross section taken in the direction of the 3 is a conceptual side view showing the arrangement of each roll of a Sendzimir type rolling mill as an example of a conventional rolling mill, and FIG. 4 is a cutaway front view showing a cross section taken along arrows 1 and 2 in FIG. 1...Top work roll. 1a, lb...Tapered part 2
...Upper thrust receiving roller, 3.Adjustment lid, 4.Upper roll replacement lid. 5...Hinge. 6... Hydraulic cylinder 1a. 7b...Wedge, 8a, 8b
... Hydraulic cylinder, 10... Bearing block. 11・
...Lower work roll, 11a, llb-tapered portion, 12...Lower thrust receiving roller, 14...Lower roll replacement lid, 52...Upper first intermediate roll, 62...Lower first intermediate roll

Claims (1)

[Claims] A chockless work roll arranged above and below a rolling material passing surface, and a plurality of intermediate rolls each supporting the upper and lower work rolls so that they can be pressed against each other by the roll surfaces;
In a rolling mill equipped with reinforcing rolls that support the upper and lower intermediate rolls so that they can be pressed against each other by their roll surfaces, and thrust receiving rollers that support both ends of the upper and lower work rolls in the roll axis direction, the rolling mill is equipped with an asymmetrical structure at both ends. The upper work roll is provided with a taper portion with a taper angle, the lower work roll is provided with a taper portion with a taper angle that abuts each taper portion of the upper work roll, and the upper and lower work rolls are moved in the roll axis direction. 1. A chockless roll bending device for a rolling mill, comprising upper and lower thrust receiving rollers supported by the upper and lower thrust receiving rollers, respectively, and roller moving means for moving at least one of the upper and lower thrust receiving rollers in the roll axis direction.